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xdc (7)
  • >> xdc (7) ( Solaris man: Макропакеты и соглашения )
  • 
    NAME
         xd, xdc - disk driver for Xylogics 7053 SMD Disk Controller
    
    SYNOPSIS
         xdc@6d,ee80/xd@slave,0:partition
    
         xdc@6d,ee90/xd@slave,0:partition
    
         xdc@6d,eea0/xd@slave,0:partition
    
         xdc@6d,eeb0/xd@slave,0:partition
    
    DESCRIPTION
         The driver for Xylogics 7053  devices  consists  of  several
         components:  a  controller  driver  (xdc) and a slave device
         driver module (xd). Each driver  module  has  an  associated
         configuration file, which lives in the same directory as the
         driver module. See driver.conf(4) and for the interpretation
         of the contents of these files.
    
         The block files access the disk using  the  system's  normal
         buffering  mechanism  and  may  be  read and written without
         regard to physical disk  records.   There  is  also  a   raw
         interface  that provides for direct transmission between the
         disk and the user's read or write buffer. A single  read  or
         write call usually results in only one I/O operation; there-
         fore raw I/O is considerably more efficient when many  words
         are transmitted. The physical names of the raw files conven-
         tionally have `,raw' appended to them. The logical names for
         the raw files live in the /dev/rdsk directory, as usual.
    
         When using raw I/O, transfer counts should be  multiples  of
         512  bytes (the size of a disk sector). Likewise, when using
         lseek(2) to specify block offsets from which to perform  raw
         I/O,  the  logical  offset  should also be a multiple of 512
         bytes.
    
         Partition 0 is normally used for the root file system  on  a
         disk,  partition 1 as a paging area (for example, swap), and
         partition 2 for backing up the entire disk. Partition 2 nor-
         mally maps the entire disk and may also be used as the mount
         point for secondary disks in the system.  The  rest  of  the
         disk is normally partition 6. For the primary disk, the user
         file system is located here.
    
    DISK SUPPORT
         This driver handles all SMD drives by reading a  label  from
         sector  0 of the drive which describes the disk geometry and
         partitioning.
    
    FILES
         /kernel/drv/xdc
               driver module
    
         /kernel/drv/xd
               driver module
    
         /kernel/drv/xdc.conf
               driver configuration file
    
         /kernel/drv/xd.conf
               driver configuration file
    
         /dev/dsk/cXdYsZ
               block devices, controller X, unit Y, slice Z
    
         /dev/rdsk/cXdYsZ
               raw devices, controller X, unit Y, slice Z
    
    ATTRIBUTES
         See attributes(5) for descriptions of the  following  attri-
         butes:
    
         ____________________________________________________________
       |        ATTRIBUTE TYPE       |        ATTRIBUTE VALUE      |
       | ____________________________|_____________________________|_
       |  Architecture               |  SPARC   (Sun-4/200,    Sun-|
       |                             |  4/300, and Sun-4/400 series|
       |                             |  only)                      |
       |_____________________________|_____________________________|
    
    
    SEE ALSO
         lseek(2), read(2), write(2), driver.conf(4),  attributes(5),
         dkio(7I), hdio(7I)
    
    NOTES
         In raw I/O read(2) and write(2)  truncate  file  offsets  to
         512-byte  block  boundaries,  and  write(2) scribbles on the
         tail of incomplete blocks. Thus, in programs that are likely
         to  access  raw  devices,  read(2),  write(2),  and lseek(2)
         should always deal in 512-byte multiples.
    
    
    
    


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